Portion of light bulb



FIG. 1 is a perspective view of a first embodiment of a portion of a light bulb showing my new design;

FIG. 2 is a front elevational view of FIG. 1;

FIG. 3 is a rear elevational view of FIG. 1;

FIG. 4 is a left side elevational view of FIG. 1;

FIG. 5 is a right side elevational view of FIG. 1;

FIG. 6 is a top elevational view of FIG. 1;

FIG. 7 is a bottom elevational view of FIG. 1;

FIG. 8 is a perspective view of a second embodiment thereof;

FIG. 9 is a front elevational view of FIG. 8;

FIG. 10 is a rear elevational view of FIG. 8;

FIG. 11 is a left side elevational view of FIG. 8;

FIG. 12 is a right side elevational view of FIG. 8;

FIG. 13 is a top elevational view of FIG. 8; and,

FIG. 14 is a bottom elevational view of FIG. 8.

The broken lines in the drawings are for illustrative purposes and represent environmental structure and unclaimed portions of the portion of the light bulb and therefore form no part of the claimed design. 

CLAIM The ornamental design for a portion of light bulb, as shown and described. 